AD590 Temperature Sensor: Datasheet, Schematic Diagram, Alternatives
Bulk Analog, Local 4V~30V Through Hole -55°C~125°C Analog Current ±2.5°C 1 (Unlimited)









Bulk Analog, Local 4V~30V Through Hole -55°C~125°C Analog Current ±2.5°C 1 (Unlimited)
The AD590 is a 2-terminal integrated circuit temperature sensor that produces an output current proportional to absolute temperature.
AD590 Pinout

AD590 Pinout
AD590 CAD Model
Symbol

AD590 Symbol
Footprint

AD590 Footprint
AD590 Description
The AD590 is a 2-terminal integrated circuit temperature transducer that produces an output current proportional to absolute temperature. For supply voltages between 4 V and 30 V, the device acts as a high impedance, constant current regulator passing 1 μA/K. Laser trimming of the chip’s thin-film resistors is used to calibrate the device to 298.2 μA output at 298.2 K (25°C).
The AD590 should be used in any temperature-sensing application below 150°C in which conventional electrical temperature sensors are currently employed. The inherent low cost of a monolithic integrated circuit combined with the elimination of support circuitry makes the AD590 an attractive alternative for many temperature measurement situations. Linearization circuitry, precision voltage amplifiers, resistance measuring circuitry, and cold junction compensation are not needed in applying the AD590.
The AD590 is particularly useful in remote sensing applications. The device is insensitive to voltage drops over long lines due to its high impedance current output. Any well-insulated twisted pair is sufficient for operation at hundreds of feet from the receiving circuitry. The output characteristics also make the AD590 easy to multiplex: the current can be switched by a CMOS multiplexer, or the supply voltage can be switched by a logic gate output.
Specifications
- TypeParameter
- Lifecycle Status
Lifecycle Status refers to the current stage of an electronic component in its product life cycle, indicating whether it is active, obsolete, or transitioning between these states. An active status means the component is in production and available for purchase. An obsolete status indicates that the component is no longer being manufactured or supported, and manufacturers typically provide a limited time frame for support. Understanding the lifecycle status is crucial for design engineers to ensure continuity and reliability in their projects.
PRODUCTION (Last Updated: 1 month ago) - Factory Lead Time8 Weeks
- Contact Plating
Contact plating (finish) provides corrosion protection for base metals and optimizes the mechanical and electrical properties of the contact interfaces.
Gold - Mount
In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.
Through Hole - Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Through Hole - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
TO-206AC, TO-52-3 Metal Can - Number of Pins3
- Test Conditions25°C
- Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
-55°C~125°C - Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Bulk - JESD-609 Code
The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.
e4 - Pbfree Code
The "Pbfree Code" parameter in electronic components refers to the code or marking used to indicate that the component is lead-free. Lead (Pb) is a toxic substance that has been widely used in electronic components for many years, but due to environmental concerns, there has been a shift towards lead-free alternatives. The Pbfree Code helps manufacturers and users easily identify components that do not contain lead, ensuring compliance with regulations and promoting environmentally friendly practices. It is important to pay attention to the Pbfree Code when selecting electronic components to ensure they meet the necessary requirements for lead-free applications.
no - Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - Number of Terminations3
- Termination
Termination in electronic components refers to the practice of matching the impedance of a circuit to prevent signal reflections and ensure maximum power transfer. It involves the use of resistors or other components at the end of transmission lines or connections. Proper termination is crucial in high-frequency applications to maintain signal integrity and reduce noise.
Through Hole - ECCN Code
An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.
EAR99 - Temperature Coefficient
The resistance-change factor per degree Celsius of temperature change is called the temperature coefficient of resistance. This factor is represented by the Greek lower-case letter “alpha” (α). A positive coefficient for a material means that its resistance increases with an increase in temperature.
POSITIVE ppm/°C - Additional Feature
Any Feature, including a modified Existing Feature, that is not an Existing Feature.
TEMPERATURE COEFFICIENT 1 UA/K - Voltage - Supply
Voltage - Supply refers to the range of voltage levels that an electronic component or circuit is designed to operate with. It indicates the minimum and maximum supply voltage that can be applied for the device to function properly. Providing supply voltages outside this range can lead to malfunction, damage, or reduced performance. This parameter is critical for ensuring compatibility between different components in a circuit.
4V~30V - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
AD590 - Pin Count
a count of all of the component leads (or pins)
3 - Output Type
The "Output Type" parameter in electronic components refers to the type of signal or data that is produced by the component as an output. This parameter specifies the nature of the output signal, such as analog or digital, and can also include details about the voltage levels, current levels, frequency, and other characteristics of the output signal. Understanding the output type of a component is crucial for ensuring compatibility with other components in a circuit or system, as well as for determining how the output signal can be utilized or processed further. In summary, the output type parameter provides essential information about the nature of the signal that is generated by the electronic component as its output.
Analog Current - Power Supplies
an electronic circuit that converts the voltage of an alternating current (AC) into a direct current (DC) voltage.?
5V - Interface
In electronic components, the term "Interface" refers to the point at which two different systems, devices, or components connect and interact with each other. It can involve physical connections such as ports, connectors, or cables, as well as communication protocols and standards that facilitate the exchange of data or signals between the connected entities. The interface serves as a bridge that enables seamless communication and interoperability between different parts of a system or between different systems altogether. Designing a reliable and efficient interface is crucial in ensuring proper functionality and performance of electronic components and systems.
Analog - Output Current
The rated output current is the maximum load current that a power supply can provide at a specified ambient temperature. A power supply can never provide more current that it's rated output current unless there is a fault, such as short circuit at the load.
298.2μA - Forward Voltage
the amount of voltage needed to get current to flow across a diode.
44V - Sensor Type
In electronic components, the parameter "Sensor Type" refers to the specific type of sensor technology used in a particular component to detect and measure physical phenomena such as light, temperature, pressure, motion, or proximity. Different sensor types utilize various principles and mechanisms to convert the detected input into an electrical signal that can be processed by the electronic component. Common sensor types include photodiodes, thermistors, accelerometers, and proximity sensors, each designed for specific applications and environments. Understanding the sensor type is crucial for selecting the right component for a given task and ensuring accurate and reliable sensing capabilities in electronic systems.
Analog, Local - Linearity
In electronic components, linearity refers to the relationship between the input and output signals of the component. A component is said to be linear if its output is directly proportional to its input over a specified range. In other words, when the input signal changes, the output signal changes in a consistent and predictable manner without introducing distortion or non-linear effects.Linearity is an important parameter in electronic components such as amplifiers, filters, and sensors, as it determines the accuracy and fidelity of signal processing. Non-linearities in components can lead to signal distortion, harmonic generation, and other undesirable effects that can degrade the performance of electronic systems.Engineers often characterize the linearity of components by measuring parameters such as gain error, harmonic distortion, and intermodulation distortion. By ensuring that components exhibit good linearity characteristics, designers can create electronic systems that accurately process signals and faithfully reproduce the desired output.
0.8 Cel - Accuracy - Highest (Lowest)
In electronic components, "Accuracy - Highest (Lowest)" refers to the range within which the actual value of a parameter can deviate from the ideal or specified value. The term "Highest" indicates the upper limit of this range, while "Lowest" indicates the lower limit. For example, if a component has an accuracy of ±5%, the highest accuracy would mean that the actual value could be within 5% above the specified value, while the lowest accuracy would mean it could be within 5% below the specified value. This parameter is crucial for ensuring the reliability and performance of electronic devices by determining how closely the component's output matches the desired value.
±2.5°C - Sensing Temperature - Local
Sensing Temperature - Local refers to the capability of an electronic component to measure the temperature in its immediate environment or vicinity. This parameter is crucial for applications that require monitoring of temperature for performance, safety, or stability purposes. It often involves temperature sensors integrated within components like microcontrollers, power regulators, or other integrated circuits. The local sensing allows for accurate temperature readings that help in adjusting operational conditions, ensuring optimal performance, and preventing thermal-related failures.
-55°C~150°C - Height3.81mm
- Length5.84mm
- Width5.84mm
- REACH SVHC
The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.
No SVHC - Radiation Hardening
Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation, especially for environments in outer space (especially beyond the low Earth orbit), around nuclear reactors and particle accelerators, or during nuclear accidents or nuclear warfare.
No - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant - Lead Free
Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.
Contains Lead
Parts with Similar Specs
- ImagePart NumberManufacturerPackage / CaseNumber of PinsMountOperating TemperatureInterfaceSensor TypeMoisture Sensitivity Level (MSL)Test ConditionView Compare
AD590KH
TO-206AC, TO-52-3 Metal Can
3
Through Hole
-55°C ~ 125°C
Analog
Analog, Local
1 (Unlimited)
25°C
TO-206AC, TO-52-3 Metal Can
3
Through Hole
-55°C ~ 125°C
Analog
Analog, Local
1 (Unlimited)
25°C
AD590 Features
Linear output current: 1 µA/K
Wide temperature range: -55°C to +150°C
Ceramic sensor package compatible with probe
Two-terminal device: voltage input/current output
Laser adjusted to ±0.5°C, calibration accuracy (AD590M)
Excellent linearity: full-scale range ±0.3°C (AD590M)
Wide power supply voltage range: 4 V to 30 V
The sensor is insulated from the housing
Low cost
AD590 Schematic Diagram

AD590 Schematic Diagram
AD590 Application Circuit
The circuit-1 shows a typical use of the AD590 as a remote temperature sensing application. The AD590 is used as a thermometer circuit that measures temperature from −55°C to +150°C, with an output voltage of 1 mV/°K.

AD590 Application Circuit-1
Connecting several AD590 units in series, as shown in circuit-2, allows the minimum of all the sensed temperatures to be indicated. In contrast, using the sensors in parallel yields the average of the sensed temperatures.

AD590 Application Circuit-2
Circuit-3 demonstrates one method by which differential temperature measurements can be made. R1 and R2 can be used to trim the output of the op-amp to indicate the desired temperature difference.

AD590 Application Circuit-3
Circuit-4 is an example of a cold junction compensation circuit for a Type J thermocouple using the AD590 to monitor the reference junction temperature. This circuit replaces an ice bath as the thermocouple reference for ambient temperatures between 15°C and 35°C.

AD590 Application Circuit-4
AD590 Alternatives
| Parts | Description | Manufacturer |
| 5962-8757104XX SENSORS/TRANSDUCERS | Analog Resistance Sensor, FP-2 | Defense Logistics Agency |
| AD590JH SENSORS/TRANSDUCERS | Analog Resistance Sensor, 298.2uA, Round, 3 Pin, Through Hole Mount | Harris Semiconductor |
| 5962-8757103VXA SENSORS/TRANSDUCERS | Analog Temperature Sensor, ANALOG TEMP SENSOR-CURRENT, FP-2 | Defense Supply Center Columbus |
| 5962-8757104XC SENSORS/TRANSDUCERS | Analog Temperature Sensor, ANALOG TEMP SENSOR-CURRENT, 298.2uA, RECTANGULAR, THROUGH HOLE MOUNT, CERAMIC, FP-2 | Defense Supply Center Columbus |
| 5962-8757103YA SENSORS/TRANSDUCERS | Analog Resistance Sensor, META CAN, 3 PIN | Defense Logistics Agency |
| 5962-8757103XA SENSORS/TRANSDUCERS | 2-Terminal IC Temperature Transducer | Analog Devices Inc |
| 5962-8757102VXA SENSORS/TRANSDUCERS | Analog Temperature Sensor, ANALOG TEMP SENSOR-CURRENT, FP-2 | Analog Devices Inc |
| AD590MH/883B SENSORS/TRANSDUCERS | 2-Terminal IC Temperature Transducer | Analog Devices Inc |
| AD590IH SENSORS/TRANSDUCERS | Analog Resistance Sensor, 298.2uA, Round, 3 Pin, Through Hole Mount | Harris Semiconductor |
| AD590LF SENSORS/TRANSDUCERS | ANALOG TEMP SENSOR-CURRENT, 298.2uA, CERAMIC PACKAGE | Intersil Corporation |
AD590 Alternatives
AD590 Package

AD590 Package
AD590 Manufacturer
Analog Devices is an international market leader in the design, production, and commercialization of a large range of high-performance integrated circuits (ICs) for analogue, mixed-signal, and digital signals (DSP) processing of almost all electronic systems. Since we started in 1965, the focus has been on the engineering challenge in electronic equipment related to signal to process.
Datasheet PDF
- Datasheets :
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Popularity by Region
What are the characteristics of AD590 temperature sensor?
Single function (only temperature measurement), small temperature measurement error, low price, fast response speed, long transmission distance, small size, micropower consumption, etc. It is suitable for remote temperature measurement and temperature control without non-linear calibration. The peripheral circuit is simple.
What is the difference between AD590 and PT100?
AD590 is a current-type temperature sensor. It converts temperature changes into current conversion. The simplest processing is to pass a resistor (10K) after the output to convert the current into a voltage, and then through the detection voltage, the current at this time can be deduced. Use the relationship between current and temperature in the sensor data to calculate the current temperature. PT100 is a resistance type temperature sensor, which converts temperature changes into resistance changes. The simplest process is to place Pt100 in a bridge, use the voltage difference at the midpoint of the bridge arm, and use a differential amplifier circuit (instrument amplifier circuit) Amplify the voltage, use the amplifier gain and bridge structure data, and use the detected voltage to inversely calculate the current resistance value, and use the relationship between resistance and temperature in the PT100 datasheet to calculate the current temperature.
Is AD590 a thermocouple or a thermal resistance?
It is neither a thermocouple nor a thermal resistance. The main principle is to detect the temperature according to the temperature change, the output current change, and the current size.
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